Drug interactions
Pimavanserin + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Moderate
Pimavanserin and Sodium sulfate / potassium sulfate / magnesium sulfate: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
This osmotic bowel preparation can cause fluid and electrolyte disturbances. Because pimavanserin prolongs the QT interval, these changes could increase the risk of arrhythmia in susceptible patients.
What this interaction means in plain words
Pimavanserin and Sodium sulfate / potassium sulfate / magnesium sulfate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Electrolyte disturbance from bowel cleansing adds to pimavanserin's QT prolongation.
What to do
Encourage hydration and check electrolytes in patients with cardiac risk factors. Consider an ECG before and after the preparation in higher-risk patients.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Pimavanserin
- Lefamulin + Pimavanserin Contraindicated
- Pimavanserin + Pimozide Contraindicated
- Pimavanserin + Vandetanib Contraindicated
- Adagrasib + Pimavanserin Major
- Amiodarone + Pimavanserin Major
- Amisulpride + Pimavanserin Major
Frequently asked questions
Can I take Pimavanserin with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as moderate. Pimavanserin and Sodium sulfate / potassium sulfate / magnesium sulfate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. This osmotic bowel preparation can cause fluid and electrolyte disturbances. Because pimavanserin prolongs the QT interval, these changes could increase the risk of arrhythmia in susceptible patients.
How serious is the interaction between Pimavanserin and Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Encourage hydration and check electrolytes in patients with cardiac risk factors. Consider an ECG before and after the preparation in higher-risk patients.
What other medicines interact with Pimavanserin?
MediHelp also lists interactions of Pimavanserin with, for example, Lefamulin, Pimozide, Vandetanib. The full list is on the Pimavanserin page.
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